Catalyst and method for producing vinyl acetate

Abstract

A process for preparing vinyl acetate in the gas phase from ethylene, acetic acid and oxygen or oxygen-containing gases over a catalyst, consisting essentially of palladium and/or its compounds, gold and/or its compounds and alkali metal compounds on a support, wherein the catalyst further comprises vanadium and/or its compounds and catalyst therefrom.

What is claimed is:  
     
       1. A process for preparing vinyl acetate in the gas phase from ethylene, acetic acid and oxygen or oxygen-containing gases over a catalyst, consisting essentially of palladium and/or its compounds, gold and/or its compounds and alkali metal compounds on a support, wherein the catalyst further comprises vanadium and/or its compounds. 
     
     
       2. The process as claimed in  claim 1 , wherein the catalyst comprises at least one potassium compound. 
     
     
       3. The process as claimed in  claim 1 , wherein the catalyst contains 0.01% by weight to 1% by weight of vanadium, based on the total mass of the catalyst. 
     
     
       4. The process of  claim 1 , wherein the catalyst contains 0.05% by weight to 0.5% by weight of vanadium, based on the total mass of the catalyst. 
     
     
       5. A catalyst consisting essentially of palladium and/or its compounds, gold and and/or its compounds and alkali metal compounds on a support, wherein the catalyst further comprises vanadium and/or its compounds. 
     
     
       6. A catalyst as claimed in  claim 5  which comprises at least one potassium compound. 
     
     
       7. A catalyst of  claim 5  which contains 0.1% by weight to 1% by weight of vanadium, based on the total mass of the catalyst. 
     
     
       8. A catalyst of  claim 5  which contains 0.05% by weight to 0.5% by weight of vanadium, based on the total mass of the catalyst.